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O
ouyang
Explorer II
March 10, 2025
Solved

How to set the gain of the TDA7491 HV 30/31 pin GAIN 0/ GAIN pin?

  • March 10, 2025
  • 2 replies
  • 817 views

How to set the gain of GAIN0/GAIN1 pins 30/31 of TDA7491HV?

ouyang_0-1741596400626.png

 

Best answer by Peter BENSCH

Welcome @ouyang, to the community!

You can configure the two pins according to the desired closed-loop gain. According to the data sheet, table 7, you can choose between 20/26/30/32dB.

In the picture you have inserted, both pins are set to VDDS = H, which corresponds to an open-loop gain of 32dB.

Does it answer your question?

Regards
/Peter

2 replies

Peter BENSCH
Peter BENSCHAnswer
Technical Moderator
March 10, 2025

Welcome @ouyang, to the community!

You can configure the two pins according to the desired closed-loop gain. According to the data sheet, table 7, you can choose between 20/26/30/32dB.

In the picture you have inserted, both pins are set to VDDS = H, which corresponds to an open-loop gain of 32dB.

Does it answer your question?

Regards
/Peter

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    AScha.3
    AScha.3
    Super User
    March 10, 2025

    See ds , figure 22 :

    Gain settings: 0+0 V -> 20dB , 3+3 V -> 32dB , etc.

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